A message begging the use of a product? An unsolicited one at that? Yes, yes you can. Pretty sure that neatly fits the definition both in fact and in spirit.
Go ahead try to never open the App Store on OS X. You can't do it because you need it for updates. When you open it you will see actual ads.
At least I can get rid of the tiny little "ad" on Windows. And I never use the Microsoft store. Ever. I have never been forced to use it and I've been using Windows 10 since release.
[0] http://gotofritz.net/blog/geekery/os-x-software-update-from-...